3.22EjemploDRM007 Co..

Introduction and Setup
OR
PRESCALER
UP/DOWN
COUNTER
PRESCALER
÷ 1, 2, 3, OR 8 ÷ 1, 2, 3, OR 8
PWM RELOAD AND INTERRUPT
INTERRUPTS
PWM
GENERATORS
COMPARATORS
DOUBLE
BUFFERED
REGISTERS
CONTROL
PWM
MODE SELECT
DEADTIME
INSERTION
DIRECT
OUTPUT CONTROL
DISTORTION
CORRECTION
FAULT
PROTECTION
FAULT
PARTITIONING
FAULT
MODE SELECT
OUTPUT
POLARITY
CONTROL
HIGH CURRENT
DRIVERS
PWM1
PWM2
PWM3
PWM4
PWM5
PWM6
MOTOR CURRENT POLARITIES
SYSTEM FAULTS
Figure 1-2. PWMMC Module Block Diagram
The six outputs of the PWMMC generator can be configured as
individual pulse-width modulated signals where each output can be
controlled as an independent output. Another option is to configure the
outputs in pairs, with the outputs complementary or not, so driving
complementary top and bottom transistors on a power stage becomes
an easy task. The outputs of the PWMMC are capable of sinking up to
20 mA. That drive capability allows for direct drive of optocouplers
without the need of additional drivers.
To prevent erroneous signals from being output from the PWMMC
module while loading new values, the bulk of the registers are double
buffered. New output is inhibited until the load okay (LDOK) bit in the
PWM control register is set indicating that it is okay to output the new
values.
DRM007
BLDC Motor Control Board for Industrial and Appliance Applications
22 Introduction and Setup MOTOROLA